用到:row-class-name="tableRowClassName"
<template>
  <el-table :data="tableData2" style="width: 100%;margin: 25px" :row-class-name="tableRowClassName">
    <el-table-column prop="date" label="日期" width="180">
    </el-table-column>
    <el-table-column prop="name" label="姓名" width="180">
    </el-table-column>
    <el-table-column prop="address" label="地址">
    </el-table-column>
  </el-table>
</template>

<style>
.el-table .warning-row {
  background: oldlace;
}

.el-table .success-row {
  background: #f0f9eb;
}
</style>

<script>
export default {
  methods: {
    tableRowClassName({ row, rowIndex }) {
      if (rowIndex === 1) {
        return "warning-row";
      } else if (rowIndex === 3) {
        return "success-row";
      }
      return "";
    },
  },
  data() {
    return {
      tableData2: [
        {
          date: "2016-05-02",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-01",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-03",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
      ],
    };
  },
};
</script>
